From 414fc2592bb9808340cad8b0373ed5a43bce88fe Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?B=C3=A9n=C3=A9dikt=20Tran?=
 <10796600+picnixz@users.noreply.github.com>
Date: Sun, 15 Jun 2025 21:00:58 +0200
Subject: [PATCH] gh-111178: fix UBSan failures for `RemoteUnwinderObject`
 (GH-135539) (cherry picked from commit
 54e29ea4eb7b54c888fd5764eef2215535e4d862)
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Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>
---
 Modules/_remote_debugging_module.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Modules/_remote_debugging_module.c b/Modules/_remote_debugging_module.c
index 86bf19e81c629d..ad14f5be03b5a2 100644
--- a/Modules/_remote_debugging_module.c
+++ b/Modules/_remote_debugging_module.c
@@ -212,6 +212,8 @@ typedef struct {
 #endif
 } RemoteUnwinderObject;
 
+#define RemoteUnwinder_CAST(op) ((RemoteUnwinderObject *)(op))
+
 typedef struct
 {
     int lineno;
@@ -2899,8 +2901,9 @@ static PyMethodDef RemoteUnwinder_methods[] = {
 };
 
 static void
-RemoteUnwinder_dealloc(RemoteUnwinderObject *self)
+RemoteUnwinder_dealloc(PyObject *op)
 {
+    RemoteUnwinderObject *self = RemoteUnwinder_CAST(op);
     PyTypeObject *tp = Py_TYPE(self);
     if (self->code_object_cache) {
         _Py_hashtable_destroy(self->code_object_cache);